Adding machine



May 13, 1924. 1,494,143

J. H. WHITE ADDING MACHINE Filed Nov. 27 1922 Patented May 13, 1924.

JOHN H. WHITE, OF STONEBURG, TEXAS.

ADDING MACHINE.

Application filed November 27, 1922. Serial No. 603,528.

To all whom it may concern.

Be it known that I, JOHN H. citizen of the United States, residing at Stoneburg, in the county of Montague and State of Texas, have invented certain new and useful Improvements in Adding Machines, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to certain improve ments in adding machines and it is an object of the invention to provide a novel and improved device of this general character provided with means whereby the adding of a series of numbers may be accomplished swiftly and accurately.

Another object of the invention is to provide a novel and improved device of this general character embodying a depressible key board together with a rotatable member movable upon depression of the key board and operating to indicate the tens to be carried from one column to a preceding column of a series of numbers to be added.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved adding machine whereby certain im portant advantages are attained and the de vice rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth. I

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the ac companying drawings, wherein Figure 1 is a vertical sectional view taken through an adding machine constructed in accordance with an embodiment of my invention;

Figure 2 is a view in top plan of the device as herein disclosed;

Figure 3 is a fragmentary view in elevation of the rotatable member as herein disclosed with certain of the parts concomitant thereto omitted.

As disclosed in the accompanying drawings, 1 denotes a hollow base having its upper or top face open, and overlylng the top or open face of said base 1 is a key board 2. The board 2 adjacent one end is pivotally connected as at 3 with the side WHITE, a

walls 4 of the base 1 whereby the board 2 is capable of swinging movement toward or from the bottom 5 of the base 1. Ooacting with the pivoted end of the board 2 is a retractible member 6 herein disclosed as a coiled spring which serves to constantly urge the opposite end of the board 2 upwardly.

Extending upwardly from the rear end wall 7 of the base 1, or that end wall remote from the pivotal connection of the board 2, is a pair of columns or standards 8 and one of said standards has extending therefrom a lug or arm 9 which overlies the base 1 sufliciently to permit the adjacent end of the board 2 to contact therewith whereby the upward swinging movement of the board 2 under the influence of the member or strip 6 is limited.

Rotatably supported between the end portions of the columns or standards 8 is a drum 10, one side portion of the periphery of which being smooth and unobstructed as at 11 while the opposite side portions of such periphery is provided therearound with a series of equi-distantly spaced teeth 12 herein disclosed as twenty in number.

Connecting the upper portion of the columns or standards 8 and overlying the drum 10 is a cross member 1 1 with which is pivotally engaged a dog or pawl 15. This dog or pawl 15 coacts with the teeth 12 to normally hold the drum 10 against rotation in one direction or under the influence of the spring member 16. The smooth and unobstructed peripheral portion 11 of the drum 10 has produced thereon and circumferentially therearound the indications 17 herein disclosed as arranged in sequence of ten from O to 200, each of said characters 17 being. complemental to a tooth 12. Carried by and extending inwardly from the upper portion of one of the columns or standards 8 and partially overlying the upper part of the portion 11 of the drum 10 is a plate 18 provided with a window or opening 19 to afford visual access to a single indication 17 in register with said opening or window 19, and which exposed charac ter or indication 17 is employed when computing with my improved machine. The spring member 16 operates to normally dispose the indication or character 0 through the window or opening 19.

The free end marginal portion of the board 2 is provided with a recess 20 through which extends the lower portion of a vertically directed arm 21, said arm being piv-' gage with the teeth 12 of the drum 10 so that upon depression of the board 2 the drum 10 will be caused to rotate a distance equal to the spacing of a tooth 12.

The arm 21 extends a slight distance below the table 2 and coacting with said depending or extended portion is a retractible member 24: which operates to constantly urge the rigid pawl or tongue 23 toward the drum 10 and in operative engagement therewith.

The upper end portion of the arm 21 is also provided with a forwardly directed finger 25 to provide means whereby the pawl or tongue 23 may be swung outwardly away from the drum 10.

'Interposed between and connecting the upper end of the arm 21 and the dog or pawl 15 is a flexible member 26 normally possessing sufficient slack to permit the requisite swinging movements of the arm 21 and the dog or pawl 15in the operation of the machine and which also serves, upon manually swinging the arm 21 away from the drum 10, to throw the dog or pawl 15 into an inoperative position so that the spring member 16 will automatically rotate the drum 10 to return the O indication or character 17 to its normal position or in a position to exposure in the opening or window 19.

Produced on the outer or exposed face of the board 2 is a field divided into one hundred blocks 27 with ten blocks disposed transversely of the board and ten'blocks disposed lengthwise ofthe board. The aligned series of blocks 27 from the upper left hand corner of said blocks to the lower right hand corner of said blocks each constitute a ten and as herein disclosed are identified in succession by consecutive letters of the alphabetynamely, from A to L with the letter A at the upper left hand corner. Each transverse series of the blocks 27 to the right of the ten block is consecutively numbered toward the right in succession from the numeral 9 and at the left of said ten block, when permissible in ascension toward the left in succession from 1.

' Also produced on the upper or outer face of the board 2 and immediately above the blocks 27 is a transverse series of blocks 28 identified from the left toward the right and in succession from 0 to 9 and to the right of the blocks 27 and immediately adjacent thereto is a longitudinally disposed series of blocks 29 consecutively numbered from 10 to 19 with the numeral 10 at the top. I

In the operation of the device the" addition of the following numbers by my improved machine will be explained? Thenumbers in the foregoing example are added upwardly. The first number 4. to be added is found directly under A and a digit of the hand preferably the forefinger of the left handis placed on E. Under E is 2, the next number, and the finger is moved to G; The next number 8 is above G in transverse alignment with E. Press down on E and thedrum 10 will be caused to move suficiently to dispose the character or indication 10 through the window or opening 19. Note the numeral 4 in the blocks 28 is directly above 8 and that in the block 29 at the right of E is the total number 14:. The

numeral 9 is in a block 27 directly above E and in transverse alignment with D. The forefinger is moved to D and the board '2 pressed downwardly which will cause the drum 10 to rotate sufficiently to expose 20 through the'window or opening 19. It is to be noted that the numeral 3 in a block'28'is directly above-D thus totaling 23. 6 is in a block 27 below D and in transverse alignment with 6 is L. In a block 28 above L is the number 9 which is added to the 20 exposed through the opening or window 19 which gives ita total of 29. 9 is then set down under the first column and the arm'21is moved to release thedrum 10 to permit the same to be rotated under the influence of the member 16 to expose 0 through'the window or opening 19. 2 is to be carriedover,

to move sufiiciently to expose through the window or opening'19 and the 6in the block 28 directly above G gives a total 0f16 and the total16 in a block 29 is to the right of G. 8 is above G to the right of E. Press down onthe key board 2 and the drum 10 moves to expose 20 through the opening or window 19. 4c in the block 28 above'E and the 20 on'the drum gives a total of 24:. 4 is directly under E and transversely aligned with 4 is K. Above K at top in a block 28 is 8 and the 20 on the drum 10 gives a total of 28. 8 is then set down in the second column being added.

The succeeding columns are added with the assistance of my improved machine in .b

substantially the same manner as hereinbefore set forth with respect to the units and tens columns and it is therefore believed that a further explanation is unnecessary. To facilitate the addition the units column can be 'added mentally and my improved machine employed in connection with the remaining columns.

When a number being added is to the left of a letter on the board 2, the board is not depressed but when the number which is to be added is to the right of a letter the board must be depressed. This is the essential part of the operation of my machine and must be strictly followed.

The spring member 16 is of a spiral type and encircles, the portion of the shaft 30 which is fixed to the drum 10, a side of the drum 30 being recessed at 31 to accommodate the spring member 16. One end portion of the spring member 16 is anchored as at 32 to the drum 10, while the opposite end portion of the spring is anchored as at 33 to the adjacent column or standard 8.

In order to properly limit the rotation of the drum 10 under the influence of the spring member 16 to assure the normal exposure of the 0 through the opening or window 19, I provide a stop 34 carried by a column or standard 8 and extending within the recess 31 of the drum 10 and with which contacts an inwardly directed stop member 35) carried by the drum 10 and arranged within the recess 31.

From the foregoing description it is thought to be obvious that an adding ma chine constructed in accordance with my invention is particularly well adapted for use y reason of the convenience and facility with which-it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim:

A computing device for use in addition comprising a movable key board having produced thereon ten rows of blocks, each row consisting of ten blocks, the blocks aligned diagonally from the upper series of blocks to the opposite end blocks of the lower series of blocks denoting tens, the blocks of each series to one side thereof being consecutively numbered in the ascension from 1 from the blocks of the other opposite side of each series, a second movable member provided with characters successively increasing by ten from 0, a window associated with said characters through which said characters are adapted to be separately exposed, and means operable upon movement of the first named movable member for moving the second movable member to an extent to expose a preceding character on the second movable member through the window.

In testimony whereof I hereunto afiix my signature.

JOHN H. WHITE. 

